The mobile streetmaps are for you! All the map data is loaded on your phone before you leave your home, so can you be on the streets, offline, and still know everything about the area you are in, and locate yourself or any street in the city. You don't need any network connection at all once the application is installed on your phone – no WiFi, no 3G, no GPRS!
This is a complete street level map for your phone. The entire map is stored on your phone, so it works where you have no access to the Internet - it works where Google Maps is inaccessible. This prevents expensive data roaming charges by loading all the map data to your phone before you leave home. You can turn off all network functions and still be able to find your way around. Lets you find all streets, and many useful locations such as ATM's, parkings, museums, and many others.
Map data (c) OpenStreetMap and contributors, CC-BY-SA.